Transcend micro SDHC 4GB class 6 flash memory card
What is the difference betwen class 6 and class 10 SD card? - Quora
What is the difference betwen class 6 and class 10 SD card? - Quora
What is the difference betwen class 6 and class 10 SD card? - Quora
Speed Class | SD Association
Amazon.com: Lerdisk Factory Wholesale 10-Pack Micro SD Card in Bulk with SD Adapter Produced by 3C Group Authorized Licencee (2GB Class 6) : Electronics
Markings: speed, size and class | Understanding microSD and SD cards: speeds, markings and more | Adafruit Learning System